It is a little long huh? lol...I'll use my real name since there might be a few other '47 Thrifty's.
Thanks for the research though guys. I haven't removed mine from my truck yet, but the bed wood is rooted through, and the truck has been sitting for 10 or so years, so I just figured it's trash, but I should try cleaning it out and see just what the inside looks like.
There's a guy that has a '51 I think that comes down to our local cruise in, and he has a late model tank of some sort under the rear of the bed and the filler is in the center rear of the bed floor. I prefer the stock location for the filler neck, but wasn't sure what other models had a similar size tank.